: any of numerous voracious elongated snakelike bony fishes (order Anguilliformes) that have a smooth slimy skin, lack pelvic fins, and have the median fins confluent around the tail compare american eel
b
: any of numerous other elongated fishes (as of the order Synbranchiformes)
2
: any of various nematodes (such as the vinegar eel)
: to move or make (one's way) sinuously or insidiously : worm
Stories my Russian friends had told me about the hundreds who were trampled at Stalin's funeral came back to me. Finally, we gave up and eeled our way out of there.—Ian Frazier
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There are more than 500 fish species known as eels. They are slender, elongated, and usually scaleless, with long dorsal and anal fi ns that are continuous around the tail tip. Eels are found in all seas, from coastal regions to the mid-depths. Freshwater eels are active, predatory fish with small embedded scales. They grow to maturity in freshwater and return to the sea, where they spawn and die. The transparent young drift to the coast and make their way upstream. Freshwater eels, considered valuable food fish, include species ranging from 4 in (10 cm) to about 111⁄2 ft (3.5 m) long.
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Noun
Unari-kun – the half-eel, half-airplane mascot of Narita City and nearby Narita International Airport, one of the two major airports serving Tokyo – was named Japan's mascot of the year in 2017.—Michael Salerno, USA Today, 8 Feb. 2026 And David Beckham celebrated his knighthood last year by taking his mum Sandra to a pie shop for a bowl of jellied eels.—Irenie Forshaw, TheWeek, 6 Feb. 2026 And these pieces of eel sushi did not disappoint.—Lucia Cheng, Des Moines Register, 28 Jan. 2026 Around the same time, the family's eel restaurant reportedly relocated and expanded to Cheongdam-dong, also in Gangnam.—Hannah Abraham, Forbes.com, 26 Jan. 2026 See All Example Sentences for eel
Word History
Etymology
Noun
Middle English ele, from Old English ǣl; akin to Old High German āl eel
First Known Use
Noun
before the 12th century, in the meaning defined at sense 1a